弯管内流体受到合外力公式的推导及应用

Derivation and Application on the Formula for Resultant External Force Acting on the Fluid inside a Curved Pipe

利用质点组的动量定理推导了一段弯管内流体受到合外力矢量的公式,利用该公式以及弯管内整个流体动量变化量的推导方法,分别解答了两道有关弯管内的流体力学问题.

The momentum theorem of a group of particles was used to derive the formula for the external force vector acting on a fluid in a curved pipe.Using this formula and the derivation method of the momentum change of the entire fluid inside the bend,this paper solved two fluid dynamics questions related to the bend.